<template>
<!-- ref/children -->
    <div class="wrapper" ref="wrapper">
      <div class="content">
        <slot></slot>
      </div>
    </div>
</template>

<script>
import BScroll from 'better-scroll'

export default {
  name: "Scroll",
  props: {
    probeType: {
      type: Number,
      default: 0
    },
    pullUpLoad: {
      type: Boolean,
      default: false
    }
  },
  data() {
    return {
        scroll: null
    }
  },
  mounted() {
    //1.创建BScroll对象
    this.scroll = new BScroll(this.$refs.wrapper,{
        click: true,
        probeType: this.probeType,
        pullUpLoad: this.pullUpLoad,
    })

    //2.监听滚动位置
   if (this.probeType === 2 || this.probeType ===3) {
      this.scroll.on('scroll',(position) => {
      this.$emit('scroll',position)
    })
   }
    //3.监听scroll滚动到底部
    if (this.pullUpLoad) {
      this.scroll.on('pullingUp', () => {
       this.$emit('pullingUp')
      })
    }
  },
  methods: {
    scrollTo(x,y,time=300) {
     this.scroll && this.scroll.scrollTo(x,y,time)
    },
    refresh() {
     this.scroll && this.scroll.refresh()
    },
    finishPullUp() {
      this.scroll && this.scroll.finishPullUp()
    },
    getScrollY() {
      return this.scroll ? this.scroll.y : 0
    }
  }
}
</script>

<style>

</style>